diff --git a/pkgs/development/python-modules/buildcatrust/default.nix b/pkgs/development/python-modules/buildcatrust/default.nix
index 957b0a7c41fc..2b859b5ad3f8 100644
--- a/pkgs/development/python-modules/buildcatrust/default.nix
+++ b/pkgs/development/python-modules/buildcatrust/default.nix
@@ -6,17 +6,17 @@
   pytestCheckHook,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "buildcatrust";
   version = "0.4.0";
   pyproject = true;
 
   src = fetchPypi {
-    inherit pname version;
+    inherit (finalAttrs) pname version;
     hash = "sha256-GYw/RN1OK5fqo3em8hia2l/IwN76hnPnFuYprqeX144=";
   };
 
-  nativeBuildInputs = [ flit-core ];
+  build-system = [ flit-core ];
 
   nativeCheckInputs = [ pytestCheckHook ];
 
@@ -37,4 +37,4 @@ buildPythonPackage rec {
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ lukegb ];
   };
-}
+})